Trajectory plots

## Joining, by = c("data_source", "signal")
## Downloading confirmed_admissions_covid_1d from covidcast for period from 2021-01-16 to 2022-01-10.
## Warning in max(ids, na.rm = TRUE): no non-missing arguments to max; returning -
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## Warning in max(ids, na.rm = TRUE): no non-missing arguments to max; returning -
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## Warning in max(ids, na.rm = TRUE): no non-missing arguments to max; returning -
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## Warning in max(ids, na.rm = TRUE): no non-missing arguments to max; returning -
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## Warning in max(ids, na.rm = TRUE): no non-missing arguments to max; returning -
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## Warning in max(ids, na.rm = TRUE): no non-missing arguments to max; returning -
## Inf
## Warning: Removed 24 rows containing missing values (geom_point).

Compare to hub

## Fetched day 2021-12-01 to 2022-01-13: num_entries = 2376
## Warning: Removed 24 rows containing missing values (geom_point).